Some one please tell me how to prevent same person input his name more than once on the same date?
My app has three item: Date/time, Name, Item
For the Name I want to add a condition(valid if) to prevent people to input his name twice on the same day.
Thank you
Please create a virtual column or real column (if the user updates date time and name through a form) called say [NamenDate] with an expression something like
CONCATENATE( [Date/Time], “-”,[Name])
Then, in the valid_if of the [Name] or [Date/Time] column, you can have an expression , something like
ISBLANK(
FILTER(
“Table Name”,
([_THISROW].[NamenDate] = [NamenDate])
)
Please replace 'Table Name" with the actual table name you have.
The technique to avoid duplicates is mentioned in the article below in the last section.
Thank you very much!!
@Suvrutt_Gurjar sorry but I have another question now. the person who ordered lunch at 7am for today may want to order again at 8am for another day:s lunch, so the same Name may appear many times, if I use FILTER, the App will not allow the same name apear again right?
Could you elaborate what type of filter you are referring to and for what purpose?
Hi @Suvrutt_Gurjar , I want to make my App as simple as possible , so I thought out a way to make it like this:
â‘ App top(edited):
③spreadsheet(edited) :
③-EnumList:
From the 2nd photo you can see if I input exactly the same data like cell D2 the App will stop me says it is duplicated, but if I just input 2023/01/21 or 2023/01/21,2023/01/25 the App still accepted it as new order. Is there a way to solve this problem?
